[OpenSIPS-Users] AAA_diameter usage

[Liviu Chircu]

On 09.07.2024 14:18, Carsten Bock wrote:
> The definition itself seems to be fine: If I rename the 
> "Server-Assignment-Type" to "SAT" and "User-Data-Already-Available" to 
> "UDA-Available", OpenSIPS starts. However, if I follow the examples 
> (e.g. module docs for aaa_diameter and here 
> https://www.opensips.org/Documentation/Tutorials-Diameter-Client-Server), 
> I fail to send the Diameter-Request:
>
> 11:10:14  ERROR  ERROR: Invalid parameter '(((avp) && (((struct 
> msg_avp_chain *)(avp))->type == MSG_AVP) && (((struct avp 
> *)(avp))->avp_eyec == (0x11355467))) && pdata)', 22
>
> Am I missing something? Can someone share some example code for 
> sending a SAR request? Is the documentation missing something?

Hello Carsten,

It is great to hear you are having fun with the module!  With regards to 
freeDiameter library errors (which are taken straight up from 
/usr/include/asm-generic/errno-base.h, btw), I've typically seen two 
codes being returned by the library:

#define EINVAL      22  /* Invalid argument */   -- most frequent
#define EEXIST      17  /* File exists */

Now, with *17* (already exists), this is returned if you are trying to 
register a *duplicate* AVP as string name, but with different properties 
(maybe diff type? diff code?  etc.).  As a general rule, the library 
won't complain if we define a perfectly (?) identical AVP twice - it 
will simply move on and return *0 *(success).

In your case, I suspect that the *22* (invalid arg) is still connected 
to AVP duplication somehow, but the library returns *22* from some other 
part of the error-handling code, as a small mistake.  Especially since 
you're saying /it works/ once you fix the name to something else.

To begin the troubleshooting, which dictionaries / fd extensions are you 
loading right now?  Because if you're loading the *dict_dcca_3gpp.fdx* 
module, this one should already contain both of your AVPs (hence 
explaining your errors!), check their definitions here on the 
/libfreeDiameter/ GitHub:

Server-Assignment-Type 
<https://github.com/freeDiameter/freeDiameter/blob/master/extensions/dict_dcca_3gpp/add_avps.c#L6999> 
and User-Data-Already-Available 
<https://github.com/freeDiameter/freeDiameter/blob/master/extensions/dict_dcca_3gpp/add_avps.c#L7138>

Best regards,

-- 
Liviu Chircu
www.twitter.com/liviuchircu  |www.opensips-solutions.com
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